Of boston



@uiten tates atnt @fitta JOHN ls. BARDEN, OF PROVIDENCE, RHODE ISLAND, AssieNoR To A. J. PERRY a COMPANY,v or BOSTON, unssnouusirrfrs.` i

Letters Patent No. 62,308, dated February 26, 1867.

IMPROVEMENT IN STEAM GENERATOR.

TO ALL PERSONS TO WHOM THESE PRESENTS SHALL COME:

Be it known that I, JOHN S. BARDEN, of the city and county of Providence, and State of Rhode Island, have invented an improved Steam Boiler or Generator, and do. hereby declaro' the same to be fully described in the following specitication, and represented in the accompanying drawings, of whichi Figure 1 is a vertical section; and i Figures 2 and 3 are horizontal sections of such boiler.

In such drawings, A denotes a cylindrical fire-piace, open at top, and formed with a grate, B, at its lower part. The said fireplace is surrounded by a series of upright fines, a a a, each of which is triangular in its horizontal section, and is open at top, so that the smoke from thefire-place may pass into such top and down the iiue. Each of the tlues a, by means of an elbow or curved channel, e, is made at its bottom to open into one of a series oi' upright iues b b, arranged with respect to thc lines a a, as represented. Each ofthe two sides -of each iue a is an extension 'of one of the sides of a flue,v, the same being so as to form a series of quadrilateral passages, c c c, arranged between the two series of iues a 11. Each iiue, c, is closed at its bottom, but at. its top opens into a water and steam chamber, C, arranged directly over the furnace or tire-place A, and being provided with a dome-shaped bottom, to constitute the crown of the furnace. A smoke pipe or conduit, D, leads from the furnace up into and through the Water andv steam chamber C. The several water passages are made to communicate with each other by conduits, d d, leading from onc into jthe other at or near their bottoms, the same being so that there may be a'percolation through such passages c c. The smoke dues b b are completed by means of a hollow drum or casing, E, which encompasses the whole boiler, and terminates at topin a chimney. or discharge pipe, F. A damper, G, should be arranged at the upper part of the pipe D, the operative handle of such damper being carried through and-beyond the casing E. A steamleduction pipe, H, to open into the steam chamber C by one or more vertical pipes,f f, and being arranged as `represented in g. 1, serves to lead steam from such chamber. The fire-place is to have a throat or fuel-supply opening, g. It is intended that the Whole or nearly the whole of this boiler, with the exception of the outer casingE, shall be castor formed in one piece of metal. v

When the boiler is in operation, the heat and smoke from the furnace pass into and down through the fines a a a, thence into and up through the iiucs b b b, and thence into the discharge ue F. The water in the passages `c c e will be exposed to the heat radiated from the iiues a 5. The water and steam chamber C derives its heat from the iues b I) the crown of the furnace, and from the pipe D. Whenthe damper is open,- the smoke escapes directly through the pipe D into the flue F, without going around through the iiues a b.

I claim the arrangement as well as the combination oi' the series of dues a, the series of fines b, the connections e, the ivater-holding spaces e, the furnace A, and the water and steam chamber G.

I also claim the arrangement as well 'as the combination of the escape pipe D and damper Gr, thc series of ilues a', the series of ilues b, the connections e, thc water-holding spaces c, the furnace A, and the water and steam chamber C. i

i also claim the arrangement as well as .th'c combination of the conduits d, the series of water spaces c, the series of dues a, the series of fiucs b, the furnace A, and the water and steam chamber C, the whole being sub-V stantially as specified.

JOHN S; BARDEN. l

Witnesses:

SAMUEL N. Plrun, `F. P. HALE, Jr. 

